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Application.UndoEnabled Property

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Visio Automation Reference

Determines whether undo information is maintained in memory. Read/write.

Version Information
 Version Added:  Visio 2000

Syntax

expression.UndoEnabled

expression   A variable that represents an Application object.

Return Value
Boolean

Remarks

When Microsoft Office Visio starts, the value of the UndoEnabled property is True. Setting the value of the UndoEnabled property to False discontinues the collection of undo information in memory and clears the existing undo information.

You should attempt to maintain the property at its current value across the complete operation that you perform. In other words, use code structured like this:

Visual Basic for Applications 
  blsPrevious = Application.UndoEnabled 
Application.UndoEnabled = False

'Large operation here
Application.UndoEnabled = blsPrevious

Example

The following Microsoft Visual Basic for Applications (VBA) macro shows how to use the UndoEnabled method to disable and then re-enable undo behavior in Visio.

Visual Basic for Applications 
  Public Sub UndoEnabled_Example()

'Disable undo
Application.UndoEnabled = False

'Draw three shapes. 
ActivePage.DrawRectangle 1, 2, 2, 1
ActivePage.DrawOval 3, 4, 4, 3
ActivePage.DrawLine 4, 5, 5, 4

'Enable undo. 
Application.UndoEnabled = True



End Sub

See Also